Bobsled



March 2 1926. 1,574,918

M.MORTENSON BOBSLED Filed 001:. 12, 1925 Afar/e12 Mark/1J0];

Patented Mar. 2, 1926.

UNITED STATES MOR'IEN MOBTENSON, OF SOUTH RAIQ'GE, WISCONSIN.

BOBSLED.

Application filed October 12, 1925.

To all whom it may concern:

Be it known that I, MoR'rnN MoR'rnNsoN, a citizen of the United States, residing at South Range, in the county of Douglas and State of \Visconsin, have invented certain new and useful Improvements in Bobsleds; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in bobsleds and has for its object to provide such a sled having cast interchangeably usable runners, crosstie beams and bolsters, and which runners and crosstie beams are held separably interlocked by removable and replaceable dowel pins. A further object of the invention is to provide such a sled that is light, strong and durable and that can be manufactured at a comparatively small cost and has few parts to get out of order. Said invention also provides the putting together of the several parts of the bobsled without the use of bolts or screws except the dowel pins and bolster pivot bolts, thus making it an extremely simple matter and inexpensive to replace a broken or worn out part.

'To the above end, generally stated, the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings:

Fig. 1 is a perspective view of the invention;

Fig. 2 is a fragmentary detail view principally in section, taken on the line 22 of Fig. 1, on an enlarged scale;

Fig. 3 is a fragmentary side view with some parts sectioned on the line 3-3 of Fig. 2;

Fig. 4 is a fragmentary perspective view of one of the runners, and the dowel pins lifted from their seats; and

Fig. 5 is a fragmentary perspective view of one of the crosstie beams and connected bolster removed from the runners and inverted.

The numeral 6 indicates the runners of the improved bobsled, each of which is formed from a single casting comprising upper and lower flanges 7 and 8, respectively, connected Serial No. 61,984.

by a Web 9. The front ends of each pair of flanges 7 and 8 are connected and the rear ends thereof are vertically spaced leaving .13 and 14 formed, respectively, in the sides of the seats 11 and crosstie beams 10. These dowel pins 12 have sufficient play in the half-seats 13 and 14: to permit limited independent movement of the runners 6 in respect to the bolsters 10 both longitudinally and laterally in order to give said runners the required flexibility in respect to the crosstie beams 10.

By reference to Figs. 3 and 5, it is important to note that the upper ends of the half-seats 1 1 are closed by terminating the same short of the tops of the crosstie beams 10, as indicated at 15, in order that said crosstie beams overlap the upper ends of the dowel pins 12 and hold the same in their half-seats 13 and 1 1 against lifting movement.

The rear pair of runners 6 have their front ends connected by a crosstie rod 16 and a spacing sleeve 17 The flanges 8 have rounded bottoms and afford shoes for the runners 6. Mounted on each crosstie beam 10 is a bolster 18, the front and rear faces of which are recessed to reduce the weight thereof, and eyes are formed in the end portions thereof to receive and hold. stakes 19.

The rear sled is attached to the front sled. by a pair of cross chains 20, the rear ends of which are attached to eye-equipped hooks 21 on the crosstie rod 16 at the ends of the spacing sleeve 17, and'the forward end portions of said cross chains are inserted through apertures 22 in the front crosstie beam 10 and held interlocked therewith in different operative lengths.

Attached to the front runners 6 is a cast tongue 23, and a cast equalizer 2 1 is attached to said tongue and in turn has secured thereto cast doubletrees 25. To assemble each sled, the dowel pins 12 are placed in the half-seats 13 and the bolster 18 then dropped into position in which its half-seats 14: receive said dowel pins and its top portions 15 overlap said dowel pins and hold the same in place.

Vhat I claim is:

l. A sled having seats in the bodies of its runners, a crosstie beam removably mounted in said seats, said runners and beam having coincident half-seats, and dowel pins mounted in said half-seats.

2. The structure defined in claim 1 in which the dowel pins have suflicient play in. the coincident half-seats to permit limited independent rocking movement of the runners both longitudinally and laterally in respect to the crosstie beam.

2-5. The structure defined in claim 1 in Which the tops of certain of the half-seats are closed and hold the dowel pins against lifting movement from the coincident halfseats.

l, A sled having U-shaped seats in the bodies of its runners, a orosstie beam removably mounted in said seats, pairs of coincident half-seats in the runners at the sides of the U-shaped seats and in the sides of the crosstie beam, and dowel pins removably mounted in the coincident halfseats and having sufficient play to permit limited independent rocking movement of the runners both longitudinally and laterally in respect to the crosstie beam, the tops of the half-seats in the crosstie beam being closed and holding the dowel pins against lifting movement from the coincident halfseats.

In testimony whereof I affix my signature.

MORTEN MORTENSON. 

